2025 Session II (c252)

APEX

Expected v2d LO offsets are +8.94 Hz at 86 GHz , +24 Hz at 94 GHz. H-maser drift rate for VEX probably +0.5720e-12 (or opposite sign). c252a has possibility of an integer +1 sec clock offset (in addition to dbbc3mon reported 0.1--0.2 usec offset) in the first 10ish scans.

NOEMA

Reference pad in f252a V. Pietu: "reference is N005 I think"
c252a Nphased=8

Metsähovi

There were no fringes to Mh during the session (thanks George for checking scans also after the fringe test!) and we have been investigating the cause for that. Our engineers found a problem with a low power level of the 5 MHz reference signal from the clock cellar. This caused a dramatic drop in the 10 MHz doubler output levels which has likely caused problems with the dbbc2 (the receiver itself was on lock and we could see maser lines). So, it is likely that the experiment failed entirely for Mh and there will be no fringes to be found.

Station data status

Availability of Mark6 recordings at correlator i.e. all completed e-transfers and shipments:

ok = all expected files e-transferred and on cluster file system
short = some e-transferred data available but looks incomplete
mk6 = on Mark6 module at correlator